package org.apache.maven.project.validation;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
 */
public class ModelValidationResult {

  /** */
  private static final String NEWLINE = System.getProperty("line.separator");

  /** */
  private List<String> messages;

  public ModelValidationResult() {
    messages = new ArrayList<String>();
  }

  public int getMessageCount() {
    return messages.size();
  }

  public String getMessage(int i) {
    return messages.get(i);
  }

  public List<String> getMessages() {
    return Collections.unmodifiableList(messages);
  }

  public void addMessage(String message) {
    messages.add(message);
  }

  public String toString() {
    return render("");
  }

  public String render(String indentation) {
    if (messages.size() == 0) {
      return indentation + "There were no validation errors.";
    }

    StringBuilder message = new StringBuilder();

    // if ( messages.size() == 1 )
    // {
    // message.append( "There was 1 validation error: " );
    // }
    // else
    // {
    // message.append( "There was " + messages.size() + " validation errors: " + NEWLINE );
    // }
    //
    for (int i = 0; i < messages.size(); i++) {
      message.append(indentation + "[" + i + "]  " + messages.get(i) + NEWLINE);
    }

    return message.toString();
  }

}
